Combination bushing puller and mounting device



July 28, 1964 CLOUD 3,142,113

COMBINATION BUSHING FULLER AND MOUNTING DEVICE Filed March 5, 1962 h I32 34 K 42 x /6 20 I0 N H /4 40 M f /r A flnnlh d p 44 35 M C 5 ATTORNEYINVENTOR. PORTER CLOUD United States Patent 3,142,113 COMBINATIONBUSHING FULLER AND MQUNTING DEVICE Porter Cloud, 12841 S. Harris Ave,Compton, Calif. Filed Mar. 5, 1962, Ser. No. 177,339 3 Claims. (Cl.29263) The present invention relates generally to the field of handtools and more particularly to a combination bushing puller and mountingdevice.

In certain present day mechanisms, particularly in the front end ofautomotive vehicles, bushings are employed that include inner and outerstraight-walled cylindrical shells which are arranged in concentricrelationship and have a web of resilient material such as rubberextending therebetween, with this resilient material being bonded to theinterior surface of the outer shell and to the exterior surface of theinner shell.

The inner shell is usually engaged by a bolt or rod, and the outer shellis press-fit into a bore of an arm or other desired portion of asupporting structure. After prolonged use, it is common to find that dueto the pressure and force exerted on the resilient material, it hascold-flowed or permanently deformed to the extent that the longitudinalaxis of the inner shell has become angularly disposed relative to thelongitudinal axis of the outer shell. After a bushing of this type hasdeteriorated to the extent that the inner and outer shells thereof arein angular relationship, it must be removed from the opening in thesupporting structure in which it has been press-fit. Occasionallyconsiderable difiiculty is experienced in removing such a bushing from asupporting structure, for as the tool used in this removal exerts apulling force on one end of the bushing, this force is also applied tothe ends of the shells due to their angular relationship and frequentlyflange out, thus preventing withdrawal of the bushing.

A major object of the present invention is to provide a combined bushingpuller and mounting device for bushings of the character described, andone by means of which bushings can be removed from the openings in whichthey are press-fit without deforming the end portions thereof, wherebyit would be necessary to remove such deformed portions by a chisel orthe like before the bushing can be pulled from its supporting structure.

Another object of the present invention is to provide a combined bushingpuller and mounting device having an extremely simple mechanicalstructure which can be fabricated from standard commercially availablematerials, requires no elaborate plant facilities for the manufacturethereof, and which can be retailed at a sufficiently low price as toencourage its widespread use.

Yet another object of the invention is to supply a combined bushingpuller and mounting device that will minimize the time and effortrequired in removing a bushing from a supporting structure, as well asthe time and effort involved in mounting a new bushing in place in sucha structure.

These and other objects and advantages of the invention will becomeapparent from the following description of a preferred form thereof, andfrom the accompanying drawing illustrating that form, in which:

FIGURE 1 is a longitudinal cross-sectional view of the device shownafter it has been mounted in a position to remove a bushing from astructure in which it is press-fit;

FIGURE 2 is a combined longitudinal cross-sectional and side elevationalview of the bushing puller after it has partially removed a bushing froma supporting structure;

FIGURE 3 is a combined side elevational and longitudinal cross-sectionalview of the bushing puller shown being used to mount a bushing in asupporting structure;

3,142,113 Patented July 28, 1964 "ice FIGURE 4 is a perspective view ofa first ring utilized in the invention; and

FIGURE 5 is a perspective view of a second ring.

Referring now to FIGURE 1 of the drawing, it will be seen that a portionA of the mechanism, such as the front end of an automobile, has an armor bracket B through which an opening C extends in which a bushing D ispress-fit. The bushing D includes an outer straightwalled cylindricalshell E and an inner shell F that is also of straight-walled cylindricalconfiguration. A web G of a resilient material is affixed to shells Eand F, and extends therebetween. It will be noted in FIGURE 1 that theweb G of resilient material associated with the bushing D is illustratedas being deformed due to prolonged application of pressures thereon tothe extent that the web supports the inner shell F at an angularposition relative to the outer shell E.

The present invention, as may best be seen in FIGURES 1 and 2, comprisesan elongate rod H having a collar I located intermediate the endsthereof and projecting outwardly therefrom. Collar J divides the rod Hinto a first portion 10 situated to the left of the collar and a secondportion 12 to the right of the collar. The first portion 10 has firstthreads 14 formed thereon. The second portion 12 is preferably ofsmaller transverse cross-sectional area than that of portion 10 and hassecond threads 16 situated on the outer end thereof. The transversecross-sectional area of second portion 12 is such as to permit thisportion to snugly and slidably engage the interior of the inner shell F.Also, the second portion 12 is sufficiently long that a substantial partthere* of extends to the right of the bushing D as shown in FIGURE 1.

A first nut K is provided that threadedly engages threads 14. A secondnut L is also provided that is adapted to engage threads 16. Thetransverse cross-sectional area of nut L is such as to permit it to bemoved through the opening C, for reasons to be hereinafter explained.

A first rigid ring M is provided that has a bore 18 and counterbore 20extending therethrough which define an interior body shoulder 22 at thejunction thereof. The bore 18 is of a size to permit the collar J tosnugly and slidably engage the same, with the right-hand side of thecollar as seen in FIGURE 1 abutting against the body shoulder 22. Thefirst ring M also includes an inwardly tapering, circumferentiallyextending edge surface 24 that is adapted to be inserted between theleft-hand ends of the inner shell F and outer shell E, as illustrated inFIGURE 1.

A second ring N is also provided which is of such external diameter asto be movable through the opening C formed in the arm B. The second ringN has two oppositely disposed, inwardly tapering circumferential edgesurfaces 26. The interior diameter of bore 28 in ring N is such that theleft-hand extremity of the inner shell F may be inserted therein. Thecentral portion 30 of ring N, together with the edge surfaces 26cooperatively define a circumferentially extending body shoulder 32 atthe junction thereof.

Normally, the inner shell F is longer than the outer shell E, and whenthe bushing is new the web G projects outwardly at both ends of theouter shell. However, after a bushing has become Worn in the mannershown in FIG URE 1, usually almost all of the projecting portions of theweb are broken away or Worn off. As a result, there is usually aprojecting portion of the inner shell F that is available to engage thebore 28. When an end portion of the inner shell F engages a portion ofthe bore 28, the tapering edge surface 26 is oriented to enter betweenshell F and the outer shell E, and due to its taper, enter the spacetherebetween.

It will be obvious that for this tapering edge surface 26 to enter thespace between the shells F and E, a longitudinally directed force mustbe applied to the second ring N. As ring N is forced toward theright-hand ends of shells F and E as shown in FIGURE 1, the surface 26together with the bore 28, cooperatively cause the outer shell E toassume a position relative to the inner shell F where the tWo shells arealigned along the same longitudinal axis.

When the second nut L is caused to engage the second threads 16 androtated thereon in an appropriate direction, it abuts against theright-hand side of ring N, and as the nut L is rotated, the ring N ismoved to the left to concentrically space the outer and inner shells Eand F equally from one another. After shells E and F have been orientedas to a common aXis as shown in FIGURE 2, the bushing D is in conditionto be forcibly removed from the opening C without danger that theright-hand ends of the shells will flare outwardly to prevent movementof the bushing through the opening.

A cylindrical cup is provided (FIGURE 1), a first end 34 of which abutsagainst the left-hand surface of the arm B. Cup 0 also has a second end36 which is closed and in which an aperture 38 is formed of such crosssection as to permit the first portion to be extended therethrough. Thebushing puller also preferably includes a ball bearing assembly P thathas a first race 40 and a second race 42 which abuts against the secondend 36 of cup 0. A plurality of hardened balls 44 are disposed betweenthe first and second races 40 and 42 as is conventional in ball bearingassemblies.

When the first nut K is caused to engage the first threads 14 and thenut is tightened on these threads in an appropriate direction, it movesto the right thereon to abut against the first race 40. As furtherrotational force is exerted on the nut by a wrench or other means, thefirst race 40 rotates relative to the second race 42, with the first nutK rotating relative to the first threads 14. As this rotation of nut Krelative to the first threads 14 takes place, the cup 0 tends to beforced to the right as illustrated in FIGURE 1, but movement in thatdirection cannot occur, for the first end 34 of the cup contacts thesurface of arm B. Accordingly, rotation of the first nut K relative tothe first threads 14 results in movement of rod H to the left, which rodmovement is only possible when the first ring M, second ring N, secondnut L and bushing D gripped therebetween are moved to the left. Rotationof nut K is continued until the bushing D is completely removed from theconfines of the opening C. After removal of bushing D, the second nut Lis rotated to free it from the second threads 16, with the second ring Nand the bushing D then being removed from the bushing puller.

After the invention has been used to remove a Worn or deformed bushingfrom the opening C, the bushing puller can then be used to dispose a newbushing D, as shown in FIGURE 3, within the confines of the opening.When used for this purpose, the first ring M of the invention ctn beremoved from engagement with collar I if desired. The new bushing D ismounted on the second portion 12, and a washer Q is caused to engage theright-hand end of this bushing. Washer Q has a bore 46 formed thereinthrough which the second portion 12 extends. Washer Q also has acircumferentially extending lip 48 that projects to the left therefrom,as shown in FIGURE 3. The dimensions of lip 38 are such that theinterior surface thereof snugly and slidably engages a projectingportion 50 of the web G, as is common in the structure of new bushingsD'. The second nut L is then caused to engage the second threads 16 tohold the Washer Q in abutting contact with the right-hand end of thebushing D. By rotating the first nut K, the rod H can be caused to moveto the left as previously described, and this movement of the rod pullsthe new bushing D into a press-fit within the confines of the opening C.

It will be particularly noted from the above descrip- 4;. tion that thesecond portion 12, the second threads 16, and the second nut Lcooperatively serve a dual purpose. First, the second nut L incooperation with the second ring N, serves to position the outer shell Eand inner shell F in true longitudinal concentric alignment to permitwithdrawal of the shells from opening C. Secondly, the same elements incooperation with the washer Q pressfit a new bushing D' into theconfines of opening C.

Although the present invention is fully capable of achieving the objectsand providing the advantages hereinbefore mentioned, it is to beunderstood that it is merely illustrative of the presently preferredembodiment thereof and I do not mean to be limited to the details ofconstruction herein shown and described, other than as defined in theappended claims.

I claim:

1. A device for use in removing a bushing of a type including concentricinner and outer straight-walled cylindrical shells joined by an innerweb of a resilient material from an opening in a solid body in whichsaid bushing is press-fit, comprising:

(a) a rod having a collar that is intermediately disposed between theends thereof to divide said rod into first and second portions, saidsecond portion having threads formed on at least that part thereofadjacent the end thereof, with said second portion being adapted toextend through said inner shell;

(b) a rigid cup having a first open end that bears against said body,and a second end in which an aperture is formed through which said firstportion of said rod projects;

(0) a first rigid ring having an interior circumferentially extendingbody shoulder at the junction of a bore and counterbore, which boresextend longitudinally through said ring, with said collar being slidablydisposed in said bore in said first ring and in abutting contact withsaid shoulder, which first ring has an inwardly tapering first endsurface that is partially insertable between first ends of said innerand outer shells;

(d) a second rigid ring mounted on said second rod portion, which secondring has an inwardly tapering second end surface that is partiallyinsertable between second ends of said inner and outer shells;

(e) a nut that engages said threads on said second portion of said rod,which second nut when rotated in a direction to move it towards saidcollar forces said second ring towards said shells to center said innershell relative to said outer shell, with the transverse cross section ofsaid second nut and second ring being of such dimensions as to permitthe same to be moved through said opening; and

(1) means for moving said first portion of said rod relative to said cupto force said first end thereof against said body and move said secondportion of said rod, bushing, second ring and nut through the opening insaid body to separate said bushing therefrom.

2. A device as defined in claim 1 wherein said first means comprise:

(:1) threads formed on said first end portion of said rod;

(b) a ball bearing assembly that includes first and second races, saidassembly having said first portion of said rod extending therethrough,with said second race being in abutting contact with said second end ofsaid cup; and

(c) a nut that engages said threads on said first portion of said rodand is in abutting contact with said first race.

3. A device for use in removing a bushing of a type including concentricinner and outer straight-walled cylindrical shells joined by an innerweb of a resilient material from an opening in a solid body in whichsaid bushing is press-fit, comprising:

(a) a rod having a collar that is intermediately disposed between theends thereof to divide said rod into first and second portions, saidfirst portion having first threads formed thereon, with said secondportion having second threads formed on at least that part adjacent theend thereof, which second portion has a transverse diameter such as topermit slidable insertion thereof in said inner shell;

(b) a rigid cup having a first end that bears against said body and asecond closed end in which an aperture is formed through which saidfirst portion of said rod projects;

(0) a first nut that engages said first threads;

(d) a ball bearing assembly that encircles said first portion of saidrod, which assembly includes a first race in contact with said first nutand a second race in contact with said second end of said cup;

(e) a first rigid ring having an interior circumferentially extendingbody shoulder at the junction of a bore and counterbore which extendlongitudinally therethrough, with said collar being slidably disposed insaid bore in said first ring and in abutting contact with said shoulder,which first ring has an inwardly tapering first end surface that ispartially insertable between first ends of said inner and outer shells;

(f) a second rigid ring mounted on said second portion of said rod,which second ring has an inwardly tapering second end surface that ispartially insertable between second ends of said first and secondshells; and

(g) a second nut that engages said second threads on said second rodportion of said rod, which second nut when rotated in a direction tomove it towards said collar forces said second ring towards said shellsto center said inner shell relative to said outer shell, with thetransverse cross section of said second nut and second ring being ofsuch dimensions as to permit said second nut and ring to be movedthrough said opening in said cup, said first nut when rotated relativeto said first threads in an appropriate direction forcing said cupagainst said body and pulling said bushing, second ring and second nutthrough said opening to free said bushing therefrom.

References Cited in the file of this patent UNITED STATES PATENTS1,736,529 Goeller Nov. 19, 1929 FOREIGN PATENTS 470,110 Great BritainAug. 10, 1937

1. A DEVICE FOR USE IN REMOVING A BUSHING OF A TYPE INCLUDING CONCENTRICINNER AND OUTER STRAIGHT-WALLED CYLINDRICAL SHELLS JOINED BY AN INNERWEB OF A RESILIENT MATERIAL FROM AN OPENING IN A SOLID BODY IN WHICHSAID BUSHING IS PRESS-FIT, COMPRISING: (A) A ROD HAVING A COLLAR THAT ISINTERMEDIATELY DISPOSED BETWEEN THE ENDS THEREOF TO DIVIDE SAID ROD INTOFIRST AND SECOND PORTIONS, SAID SECOND PORTION HAVING THREADS FORMED ONAT LEAST THAT PART THEREOF ADJACENT THE END THEREOF, WITH SAID SECONDPORTION BEING ADAPTED TO EXTEND THROUGH SAID INNER SHELL; (B) A RIGIDCUP HAVING A FIRST OPEN END THAT BEARS AGAINST SAID BODY, AND A SECONDEND IN WHICH AN APERTURE IS FORMED THROUGH WHICH SAID FIRST PORTION OFSAID ROD PROJECTS; (C) A FIRST RIGID RING HAVING AN INTERIORCIRCUMFERENTIALLY EXTENDING BODY SHOULDER AT THE JUNCTION OF A BORE ANDCOUNTERBORE, WHICH BORES EXTEND LONGITUDINALLY THROUGH SAID RING, WITHSAID COLLAR BEING SLIDABLY DISPOSED IN SAID BORE IN SAID FIRST RING ANDIN ABUTTING CONTACT WITH SAID SHOULDER, WHICH FIRST RING HAS AN INWARDLYTAPERING FIRST END SURFACE THAT IS PARTIALLY INSERTABLE BETWEEN FIRSTENDS OF SAID INNER AND OUTER SHELLS; (D) A SECOND RIGID RING MOUNTED ONSAID SECOND ROD PORTION, WHICH SECOND RING HAS AN INWARDLY TAPERINGSECOND END SURFACE THAT IS PARTIALLY INSERTABLE BETWEEN SECOND ENDS OFSAID INNER AND OUTER SHELLS; (E) A NUT THAT ENGAGES SAID THREADS ON SAIDSECOND PORTION OF SAID ROD, WHICH SECOND NUT WHEN ROTATED IN A DIRECTIONTO MOVE IT TOWARDS SAID COLLAR FORCES SAID SECOND RING TOWARDS SAIDSHELLS TO CENTER SAID INNER SHELL RELATIVE TO SAID OUTER SHELL, WITH THETRANSVERSE CROSS SECTION OF SAID SECOND NUT AND SECOND RING BEING OFSUCH DIMENSIONS AS TO PERMIT THE SAME TO BE MOVED THROUGH SAID OPENING;AND (F) MEANS FOR MOVING SAID FIRST PORTION OF SAID ROD RELATIVE TO SAIDCUP TO FORCE SAID FIRST END THEREOF AGAINST SAID BODY AND MOVE SAIDSECOND PORTION OF SAID ROD, BUSHING, SECOND RING AND NUT THROUGH THEOPENING IN SAID BODY TO SEPARATE SAID BUSHING THEREFROM.